| Method of migrating processes between networks and network system thereof -> Monitor Keywords |
|
|
  Method of migrating processes between networks and network system thereofThe Patent Description & Claims data below is from USPTO Patent Application 20080019316. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001]The present invention relates to a method of migrating a process between networks to migrate the process in a wide area while maintaining the connection between a user and the process in order to minimize a business suspension time when failure occurs in a data center or a server, and to a network system and a program of the method. [0002]In particular, the present invention relates to a method of migrating a process between networks to switch, when an operating server is switched by using a technology for switching the operating server from a main server to a backup server, the connection destination target network of a user, which has accessed the main server, to the backup server in conjunction with the switching of the operating server so that the operating server can be switched while maintaining the communication between the user and the server or between the user and the process, and to a network system and a program of the method. BACKGROUND ART [0003]When a disaster such as power failure, fire, or the like, by which a data center is affected in its entirety, occurs, a disaster recovery technology is used to enable a user who executes business through a server connected to him from a remote place, to continuously execute the business. A conventional disaster recovery technology (technology for avoiding failure caused by disaster) includes a method of switching an operating server, which provides service, to a remote server by using technology such as a dual operation, a process migration, or the like. [0004]As shown in a patent document 1, the process migration is a technology for migrating a program operating on a computer to another computer while maintaining the executing status of the program and causing the program to be continuously executed in the same status as that in the original computer. [0005]Further, as shown in a patent document 2, there are also known a VLAN switching technology and the like in which a gateway of a user site switches the connection destination VLAN of a user, as a technology for switching the connection destination target network of the user that has accessed to a main server to a backup server and switching an operating server while maintaining a connection between the user and the server or between the user and a process. [0006]Patent documents 3, 5 and 6 disclose technologies for migrating an IP address when a current system is switched to a waiting system in a dual operation arrangement. Further, a patent document 4 discloses a technology in which a client executes communication by converting a connection destination IP address from a virtual IP address to an actual IP address, and, when failure occurs, the actual IP address to be converted is switched from an actual IP address of a current (main) system to an actual IP address of a waiting (backup) system. [0007]Patent document 1: JP-A-08-329025 [0008]Patent document 2: JP-2003-375352 (JP-A-2005-142702) [0009]Patent document 3: JP-A-08-335198 [0010]Patent document 4: JP-A-09-034814 [0011]Patent document 5: JP-A-09-091233 [0012]Patent document 6: JP-A-10-320323 DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention [0013]When an operating server for providing a user with service is switched to a remote server by a disaster recovery technology, the user, which has executed business by being connected to the original server, is required to execute recovery processing for disconnecting the original server, changing a server to be connected and connecting to the changed server again, and the like so that the user is ongoingly provided with the service. During the period of the processing, the service to the user is interrupted. [0014]To continue communication without changing the connection destination identifier of the user even if the operating server is switched, there is a method of migrating a virtual connection destination identifier such as a virtual connection IP address or the like to a migration destination server simultaneously with a process migration. However, as described later, it is ordinarily difficult to share the connection destination identifier such as an IP address or the like between remote servers through a wide area network. [0015]A specific example indicating how it is difficult to share the connection destination identifier between the remote servers through the wide area network will be explained below with reference to FIG. 13. [0016]In FIG. 13, a user machine 1308 is disposed to a user site 1309, a server 1301 is disposed to a main site 1303, and a server 1302 is disposed to a backup site 1304. The main site 1303 has a router 1305 located at the boundary to a wide area Ether network (wide area Ether (registered trade mark) network) 1310, and the backup site 1304 has a router 1306 located at the boundary to it. Accordingly, the servers 1301 and 1302 belong to different LANs, respectively. A user can make communication with the respective servers 1301 and 1302 through a router 1307 of the user site 1309, the wide area Ether network 1310, and the routers 1305 and 1306. [0017]In an ordinary time, the server 1301 acts as an operating server, and the user makes use of service by being connected to the virtual IP address 192.168.2.1 of the server 1301. When disaster occurs, the operating server 1301 is switched from the server 1301 to the server 1302, and, at the same time, the virtual address 192.168.2.1 is shifted from the server 1301 to the server 1302. However, since the contents of the routing tables held by the routers of the respective sites are not switched promptly, there is a disadvantage that the shift of the IP address is not reflected to the network at once (a period of time depends on timing at which the routing tables are updated). [0018]Further, there is a method of disposing a switching destination server in a different network (or in a different virtual network such as a VLAN or the like) to prevent a connection destination identifier from being shared between remote servers through a wide area network. In this case, however, a user must execute processing such as switching of a connection destination network and reconnection to the switched network after an operating server is switched so that the user continuously uses service. [0019]As described above, when an operating server is switched to a sever belonging to a different LAN in a remote place to avoid failure, there is conventionally a disadvantage in that since a user must execute recovery processing, service is interrupted during the time of the recovery processing. [0020]An object of the present invention is to continuously provide service without requiring a user to execute recovery processing even if an operating server is switched to a remote server to avoid failure. MEANS FOR SOLVING THE PROBLEM [0021]A network system of the present invention comprises: [0022]connection control means for controlling the switching of the connection destination of a terminal; [0023]first and second servers belonging to first and second different networks, respectively and connected to the terminal, respectively through the first and second networks; [0024]operating server-switching control means for migrating a process from the first server to the second server; and [0025]server/network cooperation control means having a storage unit for storing the information of the first and second servers and the information of the second network, and connected to the operating server-switching control means and to the connection control means, [0026]wherein the server/network cooperation control means comprises information processing means for executing processing for receiving a process migration request from the first server to the second server and sending a migration start request including the information of the second server as a migration destination stored in the storage unit to the operating server-switching control means, and processing for receiving a target process migration completion notification from the operating server-switching control means and sending a switching request from the first network to the second network to the connection control means, the switching request including the information of the second network stored in the storage unit. [0027]A process migration method between networks of a network system of the present invention comprises: [0028]connection control means for controlling the switching of the connection destination of a terminal; [0029]first and second servers belonging to first and second different networks, respectively and connected to the terminal, respectively through the first and second networks; [0030]operating server-switching control means for migrating a process from the first server to the second server; and [0031]server/network cooperation control means connected to the operating server-switching control means and to the connection control means, [0032]wherein the process migration method comprises: [0033]a first step at which the server/network cooperation control means receives a process migration request from the first server to the second server, and sends a migration start request including the information of the second server as a migration destination to the operating server-switching control means; [0034]a second step at which the operating server-switching control means migrates a target process from the first server to the second server on receiving the migration start request; [0035]a third step at which the server/network cooperation control means receives a process migration completion notification from the operating server-switching control means and sends a switching request from the first network to the second network to the connection control means, the switching request including the information of the second network; and [0036]a fourth step at which the connection control means switches a target network from the first network to the second network. [0037]A server/network cooperation control device of the present invention is used in a network system, and the network system comprises: [0038]connection control means for controlling the switching of the connection destination of a terminal; [0039]first and second servers belonging to first and second different networks, respectively and connected to the terminal, respectively through the first and second networks; and [0040]operating server-switching control means for migrating a process from the first server to the second server, [0041]wherein the server/network cooperation control device is connected to the operating server-switching control means and the connection control means, and comprises: [0042]a storage unit for storing the information of the first and second servers and the information of the second network; and [0043]information processing means for executing processing for receiving a process migration request from the first server to the second server and sending a migration start request including the information of the second server as a migration destination stored in the storage unit to the operating server-switching control means, and processing for receiving a target process migration completion notification from the operating server-switching control means and sending a switching request from the first network to the second network to the connection control means, the switching request including the information of the second network stored in the storage unit. [0044]A program of a server/network cooperation control computer of the present invention is used in a network system, and the network system comprises: [0045]connection control means for controlling the switching of the connection destination of a terminal; [0046]first and second servers belonging to first and second different networks, respectively and connected to the terminal, respectively through the first and second networks; and [0047]operating server-switching control means for migrating a process from the first server to the second server, [0048]wherein the computer is connected to the operating server-switching control means and the connection control means, and [0049]wherein the program causes the computer to execute: [0050](1) processing for receiving a process migration request from the first server to the second server and sending a migration start request including the information of the second server as a migration destination stored in a storage unit of the computer to the operating server-switching control means; and [0051](2) processing for receiving a target process migration completion notification from the operating server-switching control means and sending a switching request from the first network to the second network to the connection control means, the switching request including the information of the second network stored in the storage unit. [0052]In the present invention, when failure is predicted or when an operator issues an instruction, an operating server is switched between servers in different networks across a wide area network without causing a user of a terminal being aware of the switch by executing the control of a connection and the switching control of the operating server in cooperation with each other. Specifically, first, an operating server-switching controller duplicates a process of the server of a main site (hereinafter, referred to as main server) to the server of a backup site (hereinafter, referred to as backup server) and shifts a shiftable identifier showing a connection destination such as the virtual IP address and the like of the main server (hereinafter, referred to as connection destination identifier) to the backup server. Next, a connection controller as shown in the patent document 2, which can switch the VLAN connected to the user, switches the connection destination target network of the user, and a gateway switches the connection destination from a target network including the main server to a target network including the backup server, to switch the connection destination of the user. Continue reading... Full patent description for Method of migrating processes between networks and network system thereof Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method of migrating processes between networks and network system thereof patent application. Patent Applications in related categories: 20080291874 - Handover apparatus and method in a heterogeneous wireless communication system - Provided is a handover method, in which a call manager of a network having a Circuit Switching (CS) network, a Long Term Evolution (LTE) network, and an Internet Protocol Multimedia Subsystem (IMS) network, provides handover, from the LTE network to the CS network, to a terminal that uses one radio ... 20080291877 - Method of operating a mobile wireless network - A method of operating a mobile wireless network is provided, in which, when there is a relocation, the connection may be continued essentially directly from the latest state before the relocation. User data is transmitted between a mobile station and a first base station, the user data being combined into ... 20080291876 - Protocol architecture for access mobility in wireless communications - Access-independent mobility-enabling protocol messages are mapped into DIAMETER messages and communicated with peer entities using DIAMETER. Local access-independent mobility enabling protocol messages may also be communicated using DIAMETER. In one embodiment, the IEEE 802.21 media independent handover (MIH) protocol is the access-independent mobility-enabling protocol, and MIH messages are mapped into ... 20080291875 - System and method for transmitting/receiving neighbor bs information in a communication system - In a communication system, a base station transmits a message including neighbor base station information to a mobile station, wherein neighbor base stations in the base station include m first type neighbor base stations and n second type neighbor base stations, the message includes an identifier dedicatedly allocated to the ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Method of migrating processes between networks and network system thereof or other areas of interest. ### Previous Patent Application: Location based, software control of mobile devices Next Patent Application: Method, device, computer program, and apparatus providing embedded status information in handover control signaling Industry Class: Multiplex communications ### FreshPatents.com Support Thank you for viewing the Method of migrating processes between networks and network system thereof patent info. IP-related news and info Results in 0.10072 seconds Other interesting Feshpatents.com categories: Medical: Surgery , Surgery(2) , Surgery(3) , Drug , Drug(2) , Prosthesis , Dentistry |
||
